CVE-2025-21728: bpf: Send signals asynchronously if !preemptible

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Send signals asynchronously if !preemptible BPF programs can execute in all kinds of contexts and when a program running in a non-preemptible context uses the bpf_send_signal() kfunc, it will cause issues because this kfunc can sleep. Change `irqs_disabled()` to `!preemptible()`.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6 to < feba1308bc5e8e04cee751d39fae8a9b407a9034affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < ce51eab2070e295d298f42a2f1db269cd1b56d55affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < be42a09fe898635b0093c0c8dac1bfabe225c240affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < eeef8e65041a031bd8a747a392c14b76a123a12caffected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < 78b97783496b454435639937db3303e900a24d3faffected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < 092fc76b7ab4163e008f9cde596a58dad2108260affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 to < 87c544108b612512b254c8f79aa5c0a8546e2cc4affected
7930d01afb7281edd9782971e0cca6fe587c7a7baffected
5.4.33 to < 5.4.291affected
5.5.18 to < 5.6affected

Linux Linux

Default version status: affected

5.6affected
0 to < 5.6unaffected
5.4.291 to ≤ 5.4.*unaffected
5.10.235 to ≤ 5.10.*unaffected
5.15.179 to ≤ 5.15.*unaffected
6.1.129 to ≤ 6.1.*unaffected
6.6.76 to ≤ 6.6.*unaffected
6.12.13 to ≤ 6.12.*unaffected
6.13.2 to ≤ 6.13.*unaffected
6.14 to ≤ *unaffected

CVE-2025-21728

bpf: Send signals asynchronously if !preemptible

Description

Affected products

Linux Linux

Linux Linux

References